APPARATUS AND METHOD FOR ENCODING, APPARATUS AND METHOD FOR DECODING Russian patent published in 2012 - IPC G10L19/02 H03M7/30 

FIELD: information technology.

SUBSTANCE: encoding apparatus has a section for converting an input speech/audio signal to the frequency domain to obtain a frequency domain parameter; a section for selecting as the target quantisation range, a subrange from a plurality of subranges, wherein the plurality of subranges is obtained by dividing the frequency domain parameter; a section for quantisation of the form of the frequency domain parameter in the target quantisation range; a section for quantisation of the gain of the frequency domain parameter in the target quantisation range in order to obtain encoded gain information; and a section for determining whether predictive coding should be performed, based on the number of first subranges of the target quantisation range, which are common for the second subranges of the target quantisation range previously selected.

EFFECT: reduced volume of encoded information and audio signal coding errors, and improved quality of the decoded audio signal.

20 cl, 29 dwg